Fountain pen and method of assembling same



J. c. WAHL FOUNTAIN PEN AND METHOD OF ASSEMBLING SAME ocr. 2s, 1930.

Filed Jan. 28. 192s Patented Oct. 28, 1930 UNITED STATES: PATENT oFFicE JOHN C. WAHL, or CHICAGO, ILLINOIS, AssIGNon rro lman WAHL CoMrANY, or CHICAGO, ILLINoIs, A CORPORATION or DELAWARE v FO/UNTIN PEN AND 'METHOD OF ASSEMBLING SAME Application led January 28, 1926. ISerial No. 84,263.

This invention relates to a novel fountain pen and the method of assembling the same to provide an interchangeable pen section unit that may be adapted to fit any of a large variety of different styles of pens, and in which pen section an irremovable pen is mounted in fixed relation to the feed bar.

Heretofore in the manufacture of fountain pens, it has been customary to assemble the pen-s permanently in proper Writing position upon the feed member, and then to mount the assembled pen and feed member permanently in the pen section of the fountain pen barrel. It was deemed necessary to ass`emble the completed pen at the factory because of the required nicety of adjustment of thepen on the feed member of the fountain pen. However, in theretailing of fountain pens it frequently happens that a prospective pur chaser desires a pen with a type of pen point different from that which is assembled on the particular barrel which happens to suit his fancy. Heretofore, in order to accommodate the customer, it has been necessary to maintain in stock a large assortment and variety of fountain pens because of the demand for different barrel designs and pen j points. Furthermore, dealers have frequently undertaken to change the pen point, using Whatever tools were at hand With resulting damageito the pen point and frequently resulting in an adjustment of the pen point on the feed member 'different from that adjustment Which would yield the most accurate and desirable .ow of ink.

My invention will render it impossible to' Withdraw the pen from the pen section, at

a once eliminating the trouble which ensues from inaccurate adjustment of the pen point 40 and the feed bar. eByy means of this intenchangeable pen section unit it is also possible for any user of a fountain pen to have at hand more than one pen section each carrying a pen point suitable for his 'various needs.

He can then interchange them according to the circumstances of use Without anydamage to the pen and in a very convenient manner.

' A primary object of my invention is to provide` a`n interchangeable pen section in which the pen ismounted permanently' at the factory in order thatthe proper adjustment to yield a suitable iow of ink may be assured once and for all.

Another object of my invention is tov provide an interchangeable pen section unit of comparatively low cost of production and adapted to yield itself to interchanging Withplut damage to the parts or'adjust'ment of the ow. l

A further object is to 'provide a novel o0 means and method for casting or fixing the nib in position in the pen section.

Further objects, advantages and capabilities of this invention will'hereinafter become more readily apparent. I

My invention furtherresides in the combination, construction and arrangement of parts illustrated in the accompanying -draW- ings, and While I have shown therein a preferred embodiment of my invention, I`Wish it understood that the same issusceptible of modification and change vWithout departing from the spirit of my invention.

In the drawings, Fig. 1 is a longitudinal central sectional view'of the fountain pen 75 completely assembled with a cap over the end.

ig. 2 is an elevation of Va disassembled view of the same pen, a part being in section for the sake of clearness. A y

.Fig. 3 is a longitudinal cross section showing a penl point or nib disposed on a mandrel and inserted within a pen section, preparatory to being cast or cured in place therein. O

Fig. 4 is a longitudinal central section of a portion of a pensection having a nib and feed member mounted ready for insertion in the fountain pen.

Fig. 5 is a cross-section taken on the line 5-5 of Fig. 4.

And, Fig. 6 is a side elevation of la'. trans-v parent capsule containing a complete inter# changeable j pen section unit.

Referring now to the drawings'in detail, 1 is the usual fountain'pen barrel illustrated -here Without self-filling means but, of course,

it is contem lated that such means may -be added. Wit in the barrel is located an expansible ink reservoir 2, suitablyattached to -4the reservoir sleeve 3which is adapted 'to 190 be changed considerably without departing from the essence of this invention.

Referring no'w in particular to the pen section unit, and especially to the methodl of assembling the same, it will be noted that the u Aco peu section 6 has a circumferential shoulder 7 arranged thereon. The interior of this section is accurately formed and thereafter, while the interior surface is in somewhat softened condition, a pen or nib, 8 is disposed on a mandrel 9 and pressed into the interior surface .of the section. This pressing operation forms a recessin the surface and accurately positions the pen in accordance with the design most suitable for a predetermined iiow of ink. In Fig. 2 I have shown a recess 10, formed in the nib, which Imay or may not customarily employ or may lvary in any of many ways in order to secure greater -perinanency. of the positioning of the pen within the pen section. It is ap arent that, when ther curing of the hard-rubber or pyralin ory bake'lite section is completed, this pen will be locked in a position from which it cannot be removed by any which it will not be dislodged bv any ordinary or even considerable extraordinary wear and tear. After the mandrel is withdrawn an accurately formed feed member 11 is then inserted into the pen section, and is located at the proper position and held there by a tight friction fit; The pen section unit is then ready'to be assembled with the rest of the fountain pen.

Inasmuch as a suitable seat -12K is provided on the exterior vof the pen section 6 and another seat 13 is provided at the interior edge ofthe ink reservoir sleeve, it is apparent that a leak proof joint may be made by securin the pen section tightly-.in this reservoir and drawing one seat against the other. To .accomplish this I employ a pen section retaining sleeve 5. This sleeve fits fairly tightly on the circumference of the pen section 6, and is provided with an internal circumfer" ential shoulder 14 which is adapted to abut against the shoulder-7.A When the interior threads of the pensection retaining sleeve come into tightened en agement with the exterior threads of the in reservoir sleeve, the pen section is drawn tightly of the ink reservoir. 'The pen section 6 fits into thein reservoir sleeve with a slip lit, thus holding then section in rigid alinement '-with the in reservoir sleeve. The ink reservoir sleeve itselffis in turn held in rigid alinement withl'the barrel by the fit ofthe surfac'e of the sleeve. The hdrawing up of the sleeve 5 therefore gives an f ordinary means, and from s against the seat' ortion 15 of the' musas assembled structure which is rigid enough for the most strenuous kind of use.

' A cap'16 is provided as usualto-be disposed over the end of the pen to protect the point and to prevent leakage. A shoulder may or may not be provided, as desired, on the interior of this surface to seal the chamber at the exterior end of the pen section retaining sleeve. i

A single pen section retaining sleeve. 5 may be desigiiedto'harmonize with the barrels of variousmodels of fountain pelis employed with a great number of pen designs, and the pen sectionwhich fits within the sleeve and is entirely concealed therein may be a standard size for a large number of models of pens. Or, on the -other handthc exterior contour of the sleeve 5A may vary considerably to suit the various styles ofpe'ns, while its interior may be uniform in order to'cooperate with pen sections of a single diameter. 'Ihc'seat of the ink reservoirslceve and the seat of the pen section may be uniform vention, therefore, lends itself readily to in design and thereby rendered interchangeable. This in standardization of parts, economy in manufacturing, and interchangeability of pen sections.

This invention also contemplates the furnishing of the pen section 'units with the assembled feed bar, nib and pen section, in individual capsules orothcr transparent containers, all ready u on removal from the container to be applic to any pen barrel desired.' In. this way the customer .can view and select any desired pen section assembly or unit without removing the saine from the capsule or container until ready to apply it to a barrel. In Fig. 6I have illustrated suchjii capsule 17 containing a pen section unit.

Having thus described my invention, claim: Y

1. A fountain pen comprising an ink reservoir, a sleevcon said reservoir and having a seat, a pen section provided with a feed bar and a nib lrremovably secured thereto, a seat on said section' adapted to cooperate with the seat of said reservoir sleeve, a circumferential shoulder about said section, and va s ection retaining sleeve cooperative with said shoulderfor4 retaining said section vin leak proof communication with said reservoir. Y

Y 2. In a fountain pen, a barrel comprisingan ink reservoir, a sleeve on said reservoir and having a seat, a pen section provided with a feed bar and a pen irremovably secured thereto, saidsec'tion Ahaving a seat adapted to cooperate with the seat of said reservoir 4 a circumferential shoulder about said section,

and a section retainingsleeve coo erating with said shoulder for retaining sai section in leak proof communication with said-barrel.

3. A fountain pencoiipnrisin a barrel, a removable ink reservoirp to lit withinsleeve,

lao

said barrel, a pen, a pen section and a feed member, a recess in the interior surface of saidsection, a portion of said pen being seated in said recess in a substantially irremovable manner, and a removable sleeve adapted to removably secure said pen section to said bar-4 rel establishing leak proof communication betiveen said member and said reservoir.

4. A fountain pen comprisingT a feed member, a pen, a pen section disposed about said feed member, a portion of said pen being' mandrel and inserting in said section with frictional fit a feed member, thereby establishing a fixed spaced relation of said feed member and said pen.

6. The method of assembling'a pen section unit consisting of pressing a portion of said pen into the interior surface of a pen section while the latter is in a somewhat softened condition, completing the curing of the section4 with the pen in place, thereafter inserting a feed member into said section with `frictional fit, thereby establishing a fixed relation of said member and said pen.

7. The method of assembling a fountain pen consisting of pressing a portion of said pen into the interior surface of a pen section while the latter is in a somewhat softened condition, completing the curing of the section with the pen held in place, thereafter inserting a feed member into the section with frictional fit, thereby establishing a fixed spaced relation of said feed member and said pen, and removably securing the pen section to the ink -reservoir with means including leak proof cooperative seats.

8. The method of assembling a fountain pen consisting of pressing a portion of a pen into the interior surface of a pen sect-ion while the latter is in a somewhat softened condition, completing the curing of the section with the pen held in place therein, thereafter `insertin a feed member into said section with frlctional fit, thereby establishing a fixed relation of said member and said pen, and removably securing the pen section to the ink reservoir with means including a pen section retaining sleeve and leak proof cooperative seats.

9. An interchangeable .pen section unit for fountain pens havin a feed member forming a friction tight t therewith and a nib embedded in the inner circumferential Wall portion of the pen section whereby the nib is irremovably attached to the unit;

10. In a fountain pen the combination oi' a barrel, a reservoir sleeve in the barrel, a pen section fitting into the sleeve and carrying an assembled feed bar and nib and a pen section retaining sleeve screwing onto the reservoir sleeveiand firmly securing the pen section to the reservoir sleeve.

11. In a fountain pen the combination of a barrel, a reservoir sleeve in the barrel and provided with an annular seat and a thread, a pen section formed, with a cooperative annular seat and having'a lfeed bar and nib assembled thereto, and a pen section retaining sleeve formed with` a thread adapted to engage the thread of the reservoir sleeve and arranged to draw the pen section seat tightly against the seat of the reservoir sleeve.

12. In a fountain penthe combination of a barrel, a reservoir lsleeve in the barrel and provided with an internal annular seat and an external thread, a pen section-formed with an external annular seat and external shoulder and having a feed bar and nib assembled thereto, a pen section retaining sleeve formed with an internal shoulder and a thread en.-

gaging the thread of the reservoir sleeve' whereby the shoulder of the pen section retaining sleeve lserves to force the annular,

seats of the pen section and reservoir sleeves tightly together. v

13. In a fountain pen the combination of a barrel, a reservoir sleeve in the barrel and formed with an externally threaded shoulder overlying the end of the barrel and an internal annular seat, a pen section formed with an external annular. seat and an external shoulder and having a feed bar and nib y,assembled thereto, a pen section retaining sleeve formedy with an internal shoulder and la thread, the end of the latter sleeve enga `ng the end of the barrel with the thread ofg-the pen section retaining sleeve engaging the thread of the reservoir sleeve and the shoulder of the pen section retaining sleeve engaging thatof the pen section wherebyto force the annularseats of the reservoir sleeve and the pensection into liquid tight engagement.

14. Ina fountain pen the combination vof a barrel, a reservoir sleeve frictionally fitting therein and formed with an external thread, a pen section carrying a feed bar and voir sleeve having two spaced apart shoulders in its bore andan annular seat at its end, a

pen section frictionally fitting in the reservoir sleeve with the end of the pen section resting against one of the internal shoulders of the reservoir sleeve, said pen section havingan external seat engaging with the seat on the reservoir sleeve and also formed with an external shoulder, a feed bar frictionally titting within the pen section with the end of the feed bar engaging the other shoulder in the internal bore of the reservoir sleeve,- a nib assembled between the feed har and thepen section, and a pen section retaining sleeve having-an internal shoulder engaging the shoulder of the pen section and having a thread engaging the thread of the reservoir sleeve whereby tightly to draw the annular Seats ot the pen sect-ion and reservoir sleeve together.

16. In a. fountain pen the con'ibination with a barrel, a reservoir sleeve frictionally fitting therein and formed with an overhanging shoulder engaging the end of the barrel and with a thread, a. pen section frictionally titting Within th'e reservoir sleeve and having an enlargement forming a seat against the reservoir sleeve, a. feed bar assembled within thel pen section with a nib therebetween, and

A a peli section retainingr sleeve having a shoulder engaging the enlargement of the pen section to force 1t against the reservoir sleeve, said pen section retaimng sleeve ha-vlng its inner end abutting the end of the barrel and threading onto the reservoir sleeve with the outer, end of the pen section retaining sleeve' terminating substantially flush with the outer end of the pen section.

17. In a fountain pen the combination of a barrel, a reservoir sleeve rictionally fitting therein, a pen section frictionally fitting in the reservoir sleeve and carrying a feed bar and a nib, and a pen section retaining sleeve threading onto the reservoir sleeve and serving to assemble the pen section tightly to the reservoir sleeve.

18. In a fountain pen the combination of a barrel, a pen section adapted to be attached u thereto and having a conical enlargement forming an annular tapering seat and a shoulder spaced therefrom, and an interchangeable pen section retaining sleeve havingan internal shoulder adapted to engage the shoulder of the pen section and having a thread adapted to engage a portion of the barrel for forcing the-tapering seat on the pen section into tight engagement* with a portonof the barre 19. In a fountain pen the combination of a barrel provided with a sleeve, a pen section adapted to be insertedin said barrel and sleeve and a pen section retaining sleeve' adapted to engage said sleeve for detachably assembling the pen section to thebarrel.

20. In a fountain pen the combination of a barrel provided with a threaded sleeve, a pen section frictionally fitting therein and a.

pen sect-ion retaining sleeve threaded] engaging the sleeve for detachably assem ling the pen section to the barrel.

21. In a fountain pen the combination of a barrel provided with a sleeve, apen section frietionally fitting therein and a. pen section retaining sleeve threadedly engaging a portion ol the lil-St mentioned sleeve for detachably assembling the pen section to the barrel, the outer end ofthe retaining sleeve substantially hiding the outer end of the pen section. j

22. The method of assembling a pen section unit for a. fountain pen, comprising the steps of pressing a port-ionof a nib into the interior surface ot a pen section to position it substantially irre-movable therein, and thereafter inserting a feed member in said Section.

23. The method of assembling a pen section unit for a fountain pen, comprising the steps o't forcibly imbedding a nib in a wall of a. peli section, and thereafter inserting a feed 'JOHN C. WAHL. 

